Ideal File Sizes, Formats, and Media Limits for Social Media posts

Creating the perfect post requires more than just creativity. It also means tailoring content to each platform's technical requirements. Here’s a complete guide to the ideal file sizes, formats, media counts, and aspect ratios for major social media platforms.

📌 General Media Limits

Maximum image size: 15 MB
Maximum video size: 953 MB

Facebook

Media count: 80 images or 1 video
Caption/text limit: 5,000 characters
Formats supported: JPG, PNG, BMP, WEBP, TIFF, JPEG, MP4, M4V, MOV, QT, AVI, HEIC
Video duration: 1 second to 2 hours
Recommended aspect ratios:
- Images: 1:1, 1.91:1, 4:5, 2:3, 16:9, 9:16
- Videos: 16:9, 4:5, 1:1, 2:3, 9:16

Twitter

Media count: 4 images or 1 video
Caption/text limit: 280 characters
Formats supported: JPG, PNG, WEBP, GIF, JPEG, MP4, M4V, MOV, QT, AVI, HEIC
Video duration: 1 to 140 seconds
Recommended aspect ratios:
- Images: 1:1, 1.91:1, 16:9
- Videos: 16:9, 4:5, 1:1, 2:3, 9:16

Instagram

Media count: 10 images or 1 video
Caption/text limit: 2,000 characters
Video story limit: 60 seconds
Video duration: 3 seconds to 15 minutes
Formats supported: JPG, PNG, JPEG, MP4, WEBP, M4V, MOV, QT, AVI, HEIC
Recommended aspect ratios:
- Images: 1:1, 1.91:1, 4:5, 16:9
- Videos: 1:1, 1.91:1, 4:5, 16:9

Media count: 9 images or 1 video
Caption/text limit: 3,000 characters
Video duration: 3 seconds to 10 minutes
Formats supported: JPG, PNG, WEBP, JPEG, GIF, MP4, HEIC, PDF, PPT, DOC
Recommended aspect ratios:
- Images: 1:1
- Videos: 1:1

Google Business Profile

Media count: 1 image
Caption/text limit: 1,500 characters
Formats supported: JPG, PNG, JPEG, HEIC
Recommended aspect ratios:
- Images: 4:3

Mastodon

Media count: 4 images or 1 video
Caption/text limit: 500 characters
Video duration: 2 minutes 20 seconds
Formats supported: JPG, PNG, WEBP, GIF, JPEG, MP4, M4V, MOV, QT, AVI, HEIC
Recommended aspect ratios:
- Images: 1:1, 1.91:1, 16:9
- Videos: 16:9, 4:5, 1:1, 2:3, 9:16

YouTube

Media count: 1 video
Caption/text limit: 5,000 characters
Video duration: Up to 12 hours
Formats supported: MP4, M4V, MOV, QT, AVI
Recommended aspect ratios:
- Videos: 16:9, 9:16

Reddit/Subreddit

Media count: 1 image or 1 video
Caption/text limit: 1,000 characters
Video duration: Up to 15 minutes
Formats supported: JPG, PNG, WEBP, GIF, JPEG, MP4, M4V, MOV, QT, AVI, HEIC
Recommended aspect ratios:
- Images: 1:1, 1.91:1, 4:5, 2:3, 16:9, 9:16
- Videos: 1:1, 1.91:1, 4:5, 2:3, 16:9, 9:16

TikTok

Media count: 1 video
Caption/text limit: None
Video duration: Up to 10 minutes
Formats supported: MP4, M4V, MOV, QT, AVI
Recommended aspect ratios:
- Videos: 16:9, 9:16
Frame rate: 23–60 FPS

Media count: 1 image or 1 video
Caption/text limit: 500 characters
Video duration: 1 second to 5 minutes
Formats supported: JPG, PNG, WEBP, JPEG, MP4, QT, M4V, MOV
Recommended aspect ratios:
- Images: 2:3
- Videos: 2:3

BlueSky

Media count: 4 images
Caption/text limit: 300 characters
Formats supported: JPG, PNG, WEBP, JPEG, GIF
Recommended aspect ratios:
- Images: 1:1, 1.91:1, 16:9

Threads

Media count: 10 images or 1 video
Caption/text limit: 500 characters
Video duration: 5 minutes
Formats supported: JPG, PNG, JPEG, MP4, M4V, MOV, QT, AVI, WEBP
Recommended aspect ratios:
- Images: 1:1, 1.91:1, 16:9
- Videos: 16:9, 4:5, 1:1, 2:3, 9:16

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